Toyota RAV4 manuals

Toyota RAV4 Service Manual: Torque converter clutch solenoid performance (shift solenoid valve dsl)

Toyota RAV4 Service Manual / U140f automatic transaxle / Automatic transaxle system / Diagnostic trouble code chart / Torque converter clutch solenoid performance (shift solenoid valve dsl)

Toyota RAV4. Torque converter clutch solenoid performance (shift solenoid valve dsl)


Description

The ecm uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor, intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condition of the lock-up clutch.

Then the ecm compares the engagement conditions of the lock-up clutch with the lock-up schedule in the ecm memory to detect mechanical problems of the shift solenoid valve dsl, valve body and torque converter clutch.

Toyota RAV4. Torque converter clutch solenoid performance (shift solenoid valve dsl)


Monitor description

Torque converter lock-up is controlled by the ecm based on the speed sensor (nt), speed sensor (nc), engine rpm, engine load, engine temperature, vehicle speed, transmission temperature and gear selection.

The ecm determines the lock-up status of the torque converter by comparing the engine rpm (ne) to the input turbine rpm (nt). The ecm calculates the actual transmission gear by comparing input turbine rpm control voltage to counter gear rpm (nc). When conditions are appropriate, the ecm requests "lock-up" by applying control voltage to the shift solenoid valve dsl. When the dsl is turned on, it applies pressure to the lock-up relay valve and locks the torque converter clutch.

If the ecm detects no lock-up after lock-up has been requested or if it detects lock-up when it is not requested, the ecm interprets this as a fault in the shift solenoid valve dsl or lock-up system performance.

The ecm will illuminate the mil and store the dtc.

Example:

When any of the following is met, the system judges it as a malfunction.

  1. There is a difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ecm commands lock-up.

    (Engine speed is at least 100 rpm greater than input turbine speed.)

  2. There is no difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ecm commands lock-up off.

    (The difference between engine speed and input turbine speed is less than 35 rpm.)

Monitor strategy

Toyota RAV4. Monitor strategy


Toyota RAV4. Monitor strategy


Typical enabling conditions

Toyota RAV4. Typical enabling conditions


Typical malfunction thresholds

Either of the following conditions is met: off malfunction or on malfunction

Off malfunction


On malfunction

2 Detections are necessary per driving cycle:

1St detection: temporary flag on

2Nd detection: pending fault code on

Vehicle speed must be under 10 km/h (6.2 Mph) once before 2nd detection

Toyota RAV4. On malfunction


Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

Hint:

Performing the intelligent tester's active test allows relay, vsv, actuator and other items to be operated without removing any parts. Performing the active test early in troubleshooting is one way to save time.

The data list can be displayed during the active test.

  1. Warm up the engine.
  2. Turn the ignition switch off.
  3. Connect the intelligent tester to the can vim. Then connect the can vim to the dlc3.
  4. Turn the ignition switch on and turn the tester on.
  5. Enter the following menus: diagnosis / enhanced obd ii / active test.
  6. Follow the instructions on the tester and read the active test.

Toyota RAV4. Inspection procedure


Hint:

  1. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

Hint:

Toyota RAV4. Inspection procedure


  1. Check other dtc output (in addition to dtc p0741)

  1. Connect the intelligent tester to the can vim. Then connect the can vim to the dlc3.
  2. Turn the ignition switch on and turn the tester on.
  3. Enter the following menus: diagnosis / enhanced obd ii / dtc info / current codes.
  4. Read the dtcs using the tester.

Result


Hint:

If any other codes besides p0741 are output, perform troubleshooting for those dtcs first.



  1. Inspect transmission wire (shift solenoid valve dsl)

Toyota RAV4. Inspect transmission wire (shift solenoid valve dsl)


  1. Disconnect the b27 wire connector.
  2. Measure the resistance of the transmission wire.

Standard resistance




  1. Check wire harness (transmission wire - ecm)

Toyota RAV4. Check wire harness (transmission wire - ecm)


  1. Disconnect the b30 ecm connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




Replace ecm

  1. Inspect shift solenoid valve dsl

Toyota RAV4. Inspect shift solenoid valve dsl


  1. Remove the shift solenoid valve dsl.
  2. Measure the resistance of the solenoid valve.

Standard resistance: 11 to 13 ùat 20°c (68°f)

  1. Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating noise.

Ok: valve moves and makes operating noise.



  1. Check transmission wire

Ok: the connectors and pins are securely installed.

There is no open or short on the wire harness.



  1. Inspect transmission valve body assembly

  1. Check the transmission valve body assembly.

Ok: there are no foreign objects on each valve.



  1. Inspect torque converter clutch assembly

  1. Check the torque converter clutch assembly (see page ax-153).

Ok: the torque converter clutch operates normally.



Repair automatic transaxle assembly

Brake switch "B" circuit high
Description The purpose of this circuit is to prevent the engine from stalling while driving in the lock-up condition when the brakes are suddenly applied. When the brake pedal is depressed ...

Pressure control solenoid "A " performance (shift solenoid valve sl1)
Description The ecm uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear). Then the ecm compares the actual gear with the shift schedule in t ...

Other materials:

Adjusting the position of and opening and closing the air outlets
Front center outlets Direct air flow to the left or right, up or down. Turn the knobs to open or close the vents. Turn the knob to open or close the vent for rear seat occupants. М Direct air flow to the left or right, up or down. Open the vent. Close the vent. ...

Assist map number un-writing
Description The power steering ecu outputs this dtc when it determines that the assist map is not written in the ecu. Hint: The assist map data is written in the power steering ecu to control assisting power. The assist map has 3 types. Select an assist map according to the vehicle ...

Low battery positive voltage
Description When there is an abnormality in the power supply circuit of the brake actuator (skid control ecu), the skid control ecu sets a dtc and the operation is prohibited by the fail-safe function. This dtc is set when the voltage supplied to terminal ig1 is outside the dtc detection ...

© 2011-2019 Copyright www.trav4.net